摘要:
The invention relates to a process for multi-layer coating of substrates which comprises the steps of applying at least two coating layers and curing of the applied coatings with high energy radiation and moisture; wherein at least one of the coating layers is formed from a coating composition comprising a binder system of resin solids wherein the resin has free-radically polymerizable olefinic double bonds and hydrolysable alkoxysilane groups, wherein the resin solids content of the coating composition has an equivalent weight of C=C double bonds of 200 - 2000 and has a silicon content of 1 - 10 wt-%, wherein the silicon is bound in alkoxysilane groups and wherein the coating composition contains 10-60 wt.%, relative to the complete coating composition, of polar water-miscible organic solvents with a water solubility at 20°C of at least 220 g/l and wherein the step of curing of the at least one coating layer comprises irradiation with high energy radiation thereby polymerizing the C=C double bonds via free radical polymerization and exposure to moisture thereby forming siloxane bridges from the alkoxysilane groups.
摘要:
A thermally curable hot-melt adhesive composition, comprising
a polyurethane prepolymer having isocyanate groups, wherein at least 50 % of the reactive isocyanate groups of the prepolymer are blocked, said prepolymer being the reaction product of
(1) 20 to 40 wt% of at least one straight-chain amorphous polyester having a number average molecular mass Mn of 3000 to 6000 with (2) 40 to 60 wt% of at least one polyurethane elastomer, (3) 10 to 20 wt% of at least one polyester elastomer, (4) at least one diisocyanate, (5) at least one polyol as a chain extender, and (6) at least one blocking agent; and
at least one isocyanate reactive component selected from the group consisting of polyalcohols, polyamines and hydroxy-functionalized epoxide resins; wherein the percentages are based on the total weight of polyester, polyurethane elastomer and polyester elastomer.
摘要:
The present disclosure relates to an improved electrocoating coating composition wherein the improvement is the addition of a non-water reducible anticrater agent. The non-water reducible anticrater agent is a polyesterurethane that is the reaction product of an aliphatic carboxylic acid anhydride, a monofunctional epoxy compound, a monofunctional alcohol and a diisocyanate and/or a polyisocyanate. The improved electrocoating composition provides cured coatings that have fewer craters and have a smooth surface when compared to coatings utilizing other anticrater additives.
摘要:
The invention relates to a method for generating calibrated colour data of a target using colour measurement instruments distributed in the network comprising the steps A) generating at least one standard instrument profile for the colour measurement instruments distributed in the network to correct photometric and wavelength scale differences, and B) generating at least one geometry instrument profile for the colour measurement instruments distributed in the network to correct geometry scale differences. The method can be used in applications where colour measurement instrument networks are used, particularly in robotic systems where colour measurement instruments are integrated.
摘要:
Disclosed herein is the use of a surface active adhesion promoting agent in a clearcoat composition. The adhesion promoting agent is a blocked isocyanate functional siloxane containing material. The adhesion promoting agent helps to provide adhesion to a variety of materials that may be subsequently applied to the clearcoat composition.
摘要:
A process for the production of a dark-color multi-layer coating, comprising the successive steps: (1) applying an NIR-opaque coating layer A' from a solventborne coating composition A to a substrate, (2) applying a coating layer B' from a solventborne coating composition B onto the substrate provided with coating layer A', (3) subjecting the coated substrate obtained in step (2) to a drying step, (4) applying a clear coat layer, and (5) curing the coating layers simultaneously; wherein both coating compositions A and B comprise binders and crosslinkers comprising melamine-formaldehyde resin crosslinker, wherein both coating compositions A and B comprise certain proportions of cellulose ester binder and NAD binder and/or sheet silicate and/or fumed silica and/or urea SCA and/or polyolefine wax, wherein the pigment content of coating composition A consists 90 to 100 wt.% of aluminum flake pigment and 0 to 10 wt.% of further pigment, wherein the pigment content of coating composition B consists 50 to 100 wt.% of black pigment with low NIR absorption and 0 to 50 wt.% of further pigment.
摘要:
A process for the production of a dark-color multi-layer coating, comprising the successive steps: (1) applying an NIR-opaque coating layer A' from a solventborne coating composition A to a substrate, (2) applying a coating layer B' from a solventborne coating composition B onto the substrate provided with coating layer A', (3) subjecting the coated substrate obtained in step (2) to a drying step, (4) applying a clear coat layer, and (5) curing the coating layers simultaneously; wherein both coating compositions A and B comprise binders and crosslinkers comprising melamine-formaldehyde resin crosslinker, wherein both coating compositions A and B comprise certain proportions of cellulose ester binder and NAD binder and/or sheet silicate and/or fumed silica and/or urea SCA and/or polyolefine wax, wherein the pigment content of coating composition A comprises